Biomimetic polymerization of aniline using hematin supported on halloysite nanotubes

Tierrablanca, Elisa; Romero‐García, Jorge; Roman, Paulina; Cruz-Silva, Rodolfo

doi:10.1016/j.apcata.2010.04.021

Cited by 69 publications

(40 citation statements)

References 32 publications

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“…14 As a readily available, inexpensive and biocompatibile raw material, HNT has gained growing interest in bio-related fields, such as drug carrier, 15 bioreactor and gene delivery. 16 Due to the negative zeta potential of the surface, HNTs show a better dispersion in the polymer matrix at low concentration compared to other nanoscale inorganic fillers.…”

Section: Introductionmentioning

confidence: 99%

Nano-Composite of Poly(L-Lactide) and Halloysite Nanotubes Surface-Grafted with L-Lactide Oligomer Under Microwave Irradiation

Luo

Hsu²,

Li³

et al. 2013

Journal of Biomedical Nanotechnology

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In order to improve the bonding between halloysite nanotubes (HNTs) and poly(L-lactide) (PLLA), and hence to increase the mechanical properties of HNTs/PLLA nano-composite, HNTs were surface-grafted with PLLA under microwave irradiation and then blended with PLLA matrix. The optimal conditions for grafting polymerization are: irradiation time of 30 min, microwave power of 30 W and reaction temperature of 130 degrees C. The structure and properties of the surface-grafted HNTs (g-HNTs) were characterized by Fourier transformation infrared (FTIR), thermal gravimetric analysis (TGA), X-ray diffraction (XRD) and dynamic light scattering (DLS). Nano-composites of g-HNTs/PLLA and non-grafted HNTs/PLLA were subsequently evaluated in terms of crystallinity, dispersion, interfacial interaction, mechanical performance and cytocompatibility by polarized optical microscopy (POM), field scanning electron microscope (FESM), tensile testing and cell culture experiment. Results show that the grafted PLLA chains on the surfaces of HNTs, as inter-tying molecules, played an important role in improving the adhesive strength between the nanotubes and the polymer matrix. The enhanced interaction among g-HNTs and PLLA matrix resulted in a better tensile strength and modulus compared to the pristine PLLA and HNTs/PLLA. Cell culture results indicated that g-HNTs promoted both adhesion and proliferation of M3T3 fibroblasts on the g-HNTs/PLLA composite film.

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Section: Introductionmentioning

confidence: 99%

Nano-Composite of Poly(L-Lactide) and Halloysite Nanotubes Surface-Grafted with L-Lactide Oligomer Under Microwave Irradiation

Luo

Hsu²,

Li³

et al. 2013

Journal of Biomedical Nanotechnology

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“…In chemical method hematin is immobilized onto HNTs and is used as biomimetic catalyst for polymerization of aniline in aqueous acidic medium. This method increases the catalytic activity in acidic media and is completed in minimum steps 97 .…”

Section: Use Of Hnts In Protecting Environmentmentioning

confidence: 99%

Escalating Applications of Halloysite Nanotubes

Saif

Asif

2015

J. Chil. Chem. Soc.

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In nanotechnology different nano materials are used like carbon nanotubes, nanofluids, nanoparticles, nanoemulsions, nanocapsules, etc. Due to their toxic effects the results of these nano materials are not considered safe for humans and for the environment as well. Halloysite nanotubules (HNTs) having low cost are naturally occurring environmental friendly nanotubules. These are distinctive and handy materials formed by face weathering of aluminosilicate minerals having definite ratio of aluminum, silicon, hydrogen, and oxygen. HNTs have high mechanical strength and modulus. Due to these properties it is ideal for various applications; remediation of ecological contaminants, these are acting as a career for the delivery of drugs and various macro molecules, storage of H 2 gas, for catalytic conversions and for the processing of hydrocarbons. These are also used in anticancer therapy, sustained delivery for certain agents, as a template or nanoreactor for biocatalyst, in personal care, cosmetics and as environment caring. They are also used in the fabrication of high quality white-ware ceramics, nanotemplates and nano scale reaction bottles. Due to easy dispersability in polymer matrix, abundant availability and biocompatibility, HNTs are also used in different epoxy (EP) composites. In this review, we have tried to recap the different aspects of halloysites nanotubes for their use in different research fields.

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“…The peaks at 2924 and 2852 cm À1 were assigned to stretching vibrations of C-H bonds within the PANI structure. 25,29 The characteristic bands of the zeolite at 1237 and 1033 cm À1 correspond to stretching of the O-T-O group and elongation of the early T-O-T group. 30,31 Bands at 1298 and 1146 cm À1 are due to vibrations of the C-N system (N-B-N) and the C ¼ N system (N ¼ Q ¼ N) of the acrylic secondary amine.…”

Section: Resultsmentioning

confidence: 99%

“…The resulting composite material was dried at 60 1C for 48 h. This procedure was repeated 4-5 times, as reported elsewhere. 25 Measurements Ultraviolet (UV)-visible spectra of the deprotonated samples dissolved in N-methyl-2-pyrrolidone were recorded using a UV-Vis Spectrometer SHI-MADZU UV-2401 (International Equipment Trading Ltd., Vernon Hills, IL, USA), in the wavelength range of 290-900 nm. X-ray powder diffraction patterns were obtained using a 1200 HGV diffractometer (Almelo, the Netherlands).…”

Section: Preparation Of Pani Es/hy Zeolite Compositementioning

confidence: 99%

Thermoelectrical characterization of new material based on PANI/zeolite HY composite, used for the detection of carbon dioxide

Safidine

Ghebache

Lamouri

2013

Polym J

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:In this work, conducting poly(aniline)/zeolite (PANI-HY) composites used for a carbon dioxide (CO2) gas sensor, were prepared in two ways, The first method utilized in situ polymerization of aniline with ammonium perdisulfate as an oxidizer in an aqueous medium with addition of zeolite type HY-free acids. The second method involved the dispersion of various fractions of HY (5, 10, 15, 20 and 50 wt %) in a PANI-HCl matrix by physical mixing. We focused mainly on studying the conductivity with respect to temperature and gas environment. The synthesized conducting composites were characterized by FTIR, SEM, ultraviolet-visible spectroscopy, porosity and X-ray Diffraction. The PANI-HY composites showed the ability to detect CO2 at room temperature.

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Biomimetic polymerization of aniline using hematin supported on halloysite nanotubes

Cited by 69 publications

References 32 publications

Nano-Composite of Poly(L-Lactide) and Halloysite Nanotubes Surface-Grafted with L-Lactide Oligomer Under Microwave Irradiation

Nano-Composite of Poly(L-Lactide) and Halloysite Nanotubes Surface-Grafted with L-Lactide Oligomer Under Microwave Irradiation

Escalating Applications of Halloysite Nanotubes

Thermoelectrical characterization of new material based on PANI/zeolite HY composite, used for the detection of carbon dioxide

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